{"id":"AZL-88406","summary":"CVE-2026-44899 affecting package python-mistune for versions less than 3.2.1-1","details":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the Image directive plugin validates the :width: and :height: options with a regex compiled as _num_re = re.compile(r\"^\\d+(?:\\.\\d*)?\"). When the validated value is not a plain integer, render_block_image() inserts it directly into a style=\"width:...;\" or style=\"height:...;\" attribute. Because the value was accepted by the prefix-only regex, any CSS after the leading digits reaches the style= attribute verbatim and without escaping. This vulnerability is fixed in 3.2.1.","modified":"2026-08-28T17:47:37.459461192Z","published":"2026-05-26T21:16:39Z","upstream":["CVE-2026-44899"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44899"}],"affected":[{"package":{"name":"python-mistune","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/python-mistune"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-88406.json"}}],"schema_version":"1.9.0"}